Democrats Get A Boost For Senate Battle

Politico reports that the Senate battleground map has shrunk dramatically in recent weeks. It's a net plus for Democrats. But it might not be enough to change their status as heavy underdogs to win the chamber in November.
Democratic incumbents look increasingly safe in four Rust Belt states President Trump carried in 2016 — Ohio, Michigan, Pennsylvania and Wisconsin. There Republicans are locked in a bitter primary until August. Both parties agree a core universe of states are truly in play.